The manager of a computer help desk operation has collected enough data to conclude that the distribution of time per call is normally distributed with a mean equal to 8.21 minutes and a standard deviation of 2.14 minutes. What is the probability that three randomly monitored calls will each be completed in 4 minutes or less?
A) 0.4756
B) Approximately 0.1076
C) About 0.00001
D) Can't be determined without more information.

Question

Quizplus · Accepted Answer

The probability of a single call being completed in 4 minutes or less is extremely low due to the normal distribution's properties. The probability of all three calls being completed in 4 minutes or less is even lower, making it approximately 0.00001.

The Manager of a Computer Help Desk Operation Has Collected